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/*
Copyright (C) 2000-2007 Paul Davis
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef NOISE_H
#define NOISE_H
/* Can be overrriden with any code that produces whitenoise between 0.0f and
* 1.0f, eg (random() / (float)RAND_MAX) should be a good source of noise, but
* its expensive */
#ifndef GDITHER_NOISE
#define GDITHER_NOISE gdither_noise()
#endif
inline static float gdither_noise()
{
static uint32_t rnd = 23232323;
rnd = (rnd * 196314165) + 907633515;
return rnd * 2.3283064365387e-10f;
}
#endif
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